content/renderer/media/webrtc/media_stream_remote_video_source.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_RENDERER_MEDIA_WEBRTC_MEDIA_STREAM_REMOTE_VIDEO_SOURCE_H_
   6 #define CONTENT_RENDERER_MEDIA_WEBRTC_MEDIA_STREAM_REMOTE_VIDEO_SOURCE_H_
   7
   8 #include "base/memory/weak_ptr.h"
   9 #include "base/single_thread_task_runner.h"
  10 #include "content/common/content_export.h"
  11 #include "content/renderer/media/media_stream_video_source.h"
  12 #include "third_party/WebKit/public/platform/WebMediaStreamSource.h"
  13 #include "third_party/libjingle/source/talk/app/webrtc/mediastreaminterface.h"
  14
  15 namespace content {
  16
  17 class TrackObserver;
  18
  19 // MediaStreamRemoteVideoSource implements the MediaStreamVideoSource interface
  20 // for video tracks received on a PeerConnection. The purpose of the class is
  21 // to make sure there is no difference between a video track where the source is
  22 // a local source and a video track where the source is a remote video track.
  23 class CONTENT_EXPORT MediaStreamRemoteVideoSource
  24      : public MediaStreamVideoSource {
  25  public:
  26   MediaStreamRemoteVideoSource(scoped_ptr<TrackObserver> observer);
  27   virtual ~MediaStreamRemoteVideoSource();
  28
  29  protected:
  30   // Implements MediaStreamVideoSource.
  31   void GetCurrentSupportedFormats(
  32       int max_requested_width,
  33       int max_requested_height,
  34       double max_requested_frame_rate,
  35       const VideoCaptureDeviceFormatsCB& callback) override;
  36
  37   void StartSourceImpl(
  38       const media::VideoCaptureFormat& format,
  39       const blink::WebMediaConstraints& constraints,
  40       const VideoCaptureDeliverFrameCB& frame_callback) override;
  41
  42   void StopSourceImpl() override;
  43
  44   // Used by tests to test that a frame can be received and that the
  45   // MediaStreamRemoteVideoSource behaves as expected.
  46   webrtc::VideoRendererInterface* RenderInterfaceForTest();
  47
  48  private:
  49   void OnChanged(webrtc::MediaStreamTrackInterface::TrackState state);
  50
  51   // Internal class used for receiving frames from the webrtc track on a
  52   // libjingle thread and forward it to the IO-thread.
  53   class RemoteVideoSourceDelegate;
  54   scoped_refptr<RemoteVideoSourceDelegate> delegate_;
  55   scoped_ptr<TrackObserver> observer_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(MediaStreamRemoteVideoSource);
  58 };
  59
  60 }  // namespace content
  61
  62 #endif  // CONTENT_RENDERER_MEDIA_WEBRTC_MEDIA_STREAM_REMOTE_VIDEO_SOURCE_H_